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-rw-r--r--arch/blackfin/kernel/ptrace.c183
1 files changed, 99 insertions, 84 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 6a387eec6b65..0982b5d5af10 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -1,30 +1,8 @@
/*
- * File: arch/blackfin/kernel/ptrace.c
- * Based on: Taken from linux/kernel/ptrace.c
- * Author: linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
+ * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
+ * these modifications are Copyright 2004-2009 Analog Devices Inc.
*
- * Created: 1/23/92
- * Description:
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under the GPL-2
*/
#include <linux/kernel.h>
@@ -206,6 +184,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
int ret;
unsigned long __user *datap = (unsigned long __user *)data;
+ void *paddr = (void *)addr;
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
@@ -215,42 +194,49 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
case PTRACE_PEEKTEXT: /* read word at location addr. */
{
unsigned long tmp = 0;
- int copied;
+ int copied = 0, to_copy = sizeof(tmp);
ret = -EIO;
- pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + %ld\n", addr, sizeof(data));
- if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
+ pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + %i\n", addr, to_copy);
+ if (is_user_addr_valid(child, addr, to_copy) < 0)
break;
pr_debug("ptrace: user address is valid\n");
- if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start()
- && addr + sizeof(tmp) <= get_l1_code_start() + L1_CODE_LENGTH) {
- safe_dma_memcpy (&tmp, (const void *)(addr), sizeof(tmp));
- copied = sizeof(tmp);
-
- } else if (L1_DATA_A_LENGTH != 0 && addr >= L1_DATA_A_START
- && addr + sizeof(tmp) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
- memcpy(&tmp, (const void *)(addr), sizeof(tmp));
- copied = sizeof(tmp);
-
- } else if (L1_DATA_B_LENGTH != 0 && addr >= L1_DATA_B_START
- && addr + sizeof(tmp) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
- memcpy(&tmp, (const void *)(addr), sizeof(tmp));
- copied = sizeof(tmp);
-
- } else if (addr >= FIXED_CODE_START
- && addr + sizeof(tmp) <= FIXED_CODE_END) {
- copy_from_user_page(0, 0, 0, &tmp, (const void *)(addr), sizeof(tmp));
- copied = sizeof(tmp);
-
- } else
+ switch (bfin_mem_access_type(addr, to_copy)) {
+ case BFIN_MEM_ACCESS_CORE:
+ case BFIN_MEM_ACCESS_CORE_ONLY:
copied = access_process_vm(child, addr, &tmp,
- sizeof(tmp), 0);
+ to_copy, 0);
+ if (copied)
+ break;
+
+ /* hrm, why didn't that work ... maybe no mapping */
+ if (addr >= FIXED_CODE_START &&
+ addr + to_copy <= FIXED_CODE_END) {
+ copy_from_user_page(0, 0, 0, &tmp, paddr, to_copy);
+ copied = to_copy;
+ } else if (addr >= BOOT_ROM_START) {
+ memcpy(&tmp, paddr, to_copy);
+ copied = to_copy;
+ }
- pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
- if (copied != sizeof(tmp))
break;
- ret = put_user(tmp, datap);
+ case BFIN_MEM_ACCESS_DMA:
+ if (safe_dma_memcpy(&tmp, paddr, to_copy))
+ copied = to_copy;
+ break;
+ case BFIN_MEM_ACCESS_ITEST:
+ if (isram_memcpy(&tmp, paddr, to_copy))
+ copied = to_copy;
+ break;
+ default:
+ copied = 0;
+ break;
+ }
+
+ pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
+ if (copied == to_copy)
+ ret = put_user(tmp, datap);
break;
}
@@ -277,9 +263,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
tmp = child->mm->start_data;
#ifdef CONFIG_BINFMT_ELF_FDPIC
} else if (addr == (sizeof(struct pt_regs) + 12)) {
- tmp = child->mm->context.exec_fdpic_loadmap;
+ goto case_PTRACE_GETFDPIC_EXEC;
} else if (addr == (sizeof(struct pt_regs) + 16)) {
- tmp = child->mm->context.interp_fdpic_loadmap;
+ goto case_PTRACE_GETFDPIC_INTERP;
#endif
} else {
tmp = get_reg(child, addr);
@@ -288,49 +274,78 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
}
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+ case PTRACE_GETFDPIC: {
+ unsigned long tmp = 0;
+
+ switch (addr) {
+ case_PTRACE_GETFDPIC_EXEC:
+ case PTRACE_GETFDPIC_EXEC:
+ tmp = child->mm->context.exec_fdpic_loadmap;
+ break;
+ case_PTRACE_GETFDPIC_INTERP:
+ case PTRACE_GETFDPIC_INTERP:
+ tmp = child->mm->context.interp_fdpic_loadmap;
+ break;
+ default:
+ break;
+ }
+
+ ret = put_user(tmp, datap);
+ break;
+ }
+#endif
+
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKEDATA:
pr_debug("ptrace: PTRACE_PEEKDATA\n");
/* fall through */
case PTRACE_POKETEXT: /* write the word at location addr. */
{
- int copied;
+ int copied = 0, to_copy = sizeof(data);
ret = -EIO;
- pr_debug("ptrace: POKETEXT at addr 0x%08lx + %ld bytes %lx\n",
- addr, sizeof(data), data);
- if (is_user_addr_valid(child, addr, sizeof(data)) < 0)
+ pr_debug("ptrace: POKETEXT at addr 0x%08lx + %i bytes %lx\n",
+ addr, to_copy, data);
+ if (is_user_addr_valid(child, addr, to_copy) < 0)
break;
pr_debug("ptrace: user address is valid\n");
- if (L1_CODE_LENGTH != 0 && addr >= get_l1_code_start()
- && addr + sizeof(data) <= get_l1_code_start() + L1_CODE_LENGTH) {
- safe_dma_memcpy ((void *)(addr), &data, sizeof(data));
- copied = sizeof(data);
-
- } else if (L1_DATA_A_LENGTH != 0 && addr >= L1_DATA_A_START
- && addr + sizeof(data) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
- memcpy((void *)(addr), &data, sizeof(data));
- copied = sizeof(data);
-
- } else if (L1_DATA_B_LENGTH != 0 && addr >= L1_DATA_B_START
- && addr + sizeof(data) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
- memcpy((void *)(addr), &data, sizeof(data));
- copied = sizeof(data);
-
- } else if (addr >= FIXED_CODE_START
- && addr + sizeof(data) <= FIXED_CODE_END) {
- copy_to_user_page(0, 0, 0, (void *)(addr), &data, sizeof(data));
- copied = sizeof(data);
-
- } else
+ switch (bfin_mem_access_type(addr, to_copy)) {
+ case BFIN_MEM_ACCESS_CORE:
+ case BFIN_MEM_ACCESS_CORE_ONLY:
copied = access_process_vm(child, addr, &data,
- sizeof(data), 1);
+ to_copy, 0);
+ if (copied)
+ break;
+
+ /* hrm, why didn't that work ... maybe no mapping */
+ if (addr >= FIXED_CODE_START &&
+ addr + to_copy <= FIXED_CODE_END) {
+ copy_to_user_page(0, 0, 0, paddr, &data, to_copy);
+ copied = to_copy;
+ } else if (addr >= BOOT_ROM_START) {
+ memcpy(paddr, &data, to_copy);
+ copied = to_copy;
+ }
- pr_debug("ptrace: copied size %d\n", copied);
- if (copied != sizeof(data))
break;
- ret = 0;
+ case BFIN_MEM_ACCESS_DMA:
+ if (safe_dma_memcpy(paddr, &data, to_copy))
+ copied = to_copy;
+ break;
+ case BFIN_MEM_ACCESS_ITEST:
+ if (isram_memcpy(paddr, &data, to_copy))
+ copied = to_copy;
+ break;
+ default:
+ copied = 0;
+ break;
+ }
+
+ pr_debug("ptrace: copied size %d\n", copied);
+ if (copied == to_copy)
+ ret = 0;
break;
}
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